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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--              A D A . T E X T _ I O . C O M P L E X _ A U X               --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --

--                                                                          --

-- GNAT is free software;  you can  redistribute it  and/or modify it under --

-- terms of the  GNU General Public License as published  by the Free Soft- --

-- ware  Foundation;  either version 3,  or (at your option) any later ver- --

-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --

-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --

-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;

with Ada.Text_IO.Float_Aux;

with System.Img_Real; use System.Img_Real;

package body Ada.Text_IO.Complex_Aux is

   package Aux renames Ada.Text_IO.Float_Aux;

   ---------

   -- Get --

   ---------

   procedure Get

     (File  : File_Type;

      ItemR : out Long_Long_Float;

      ItemI : out Long_Long_Float;

      Width : Field)

   is

      Buf   : String (1 .. Field'Last);

      Stop  : Integer := 0;

      Ptr   : aliased Integer;

      Paren : Boolean := False;

   begin

      --  General note for following code, exceptions from the calls to

      --  Get for components of the complex value are propagated.

      if Width /= 0 then

         Load_Width (File, Width, Buf, Stop);

         Gets (Buf (1 .. Stop), ItemR, ItemI, Ptr);

         for J in Ptr + 1 .. Stop loop

            if not Is_Blank (Buf (J)) then

               raise Data_Error;

            end if;

         end loop;

      --  Case of width = 0

      else

         Load_Skip (File);

         Ptr := 0;

         Load (File, Buf, Ptr, '(', Paren);

         Aux.Get (File, ItemR, 0);

         Load_Skip (File);

         Load (File, Buf, Ptr, ',');

         Aux.Get (File, ItemI, 0);

         if Paren then

            Load_Skip (File);

            Load (File, Buf, Ptr, ')', Paren);

            if not Paren then

               raise Data_Error;

            end if;

         end if;

      end if;

   end Get;

   ----------

   -- Gets --

   ----------

   procedure Gets

     (From  : String;

      ItemR : out Long_Long_Float;

      ItemI : out Long_Long_Float;

      Last  : out Positive)

   is

      Paren : Boolean;

      Pos   : Integer;

   begin

      String_Skip (From, Pos);

      if From (Pos) = '(' then

         Pos := Pos + 1;

         Paren := True;

      else

         Paren := False;

      end if;

      Aux.Gets (From (Pos .. From'Last), ItemR, Pos);

      String_Skip (From (Pos + 1 .. From'Last), Pos);

      if From (Pos) = ',' then

         Pos := Pos + 1;

      end if;

      Aux.Gets (From (Pos .. From'Last), ItemI, Pos);

      if Paren then

         String_Skip (From (Pos + 1 .. From'Last), Pos);

         if From (Pos) /= ')' then

            raise Data_Error;

         end if;

      end if;

      Last := Pos;

   end Gets;

   ---------

   -- Put --

   ---------

   procedure Put

     (File  : File_Type;

      ItemR : Long_Long_Float;

      ItemI : Long_Long_Float;

      Fore  : Field;

      Aft   : Field;

      Exp   : Field)

   is

   begin

      Put (File, '(');

      Aux.Put (File, ItemR, Fore, Aft, Exp);

      Put (File, ',');

      Aux.Put (File, ItemI, Fore, Aft, Exp);

      Put (File, ')');

   end Put;

   ----------

   -- Puts --

   ----------

   procedure Puts

     (To    : out String;

      ItemR : Long_Long_Float;

      ItemI : Long_Long_Float;

      Aft   : Field;

      Exp   : Field)

   is

      I_String : String (1 .. 3 * Field'Last);

      R_String : String (1 .. 3 * Field'Last);

      Iptr : Natural;

      Rptr : Natural;

   begin

      --  Both parts are initially converted with a Fore of 0

      Rptr := 0;

      Set_Image_Real (ItemR, R_String, Rptr, 0, Aft, Exp);

      Iptr := 0;

      Set_Image_Real (ItemI, I_String, Iptr, 0, Aft, Exp);

      --  Check room for both parts plus parens plus comma (RM G.1.3(34))

      if Rptr + Iptr + 3 > To'Length then

         raise Layout_Error;

      end if;

      --  If there is room, layout result according to (RM G.1.3(31-33))

      To (To'First) := '(';

      To (To'First + 1 .. To'First + Rptr) := R_String (1 .. Rptr);

      To (To'First + Rptr + 1) := ',';

      To (To'Last) := ')';

      To (To'Last - Iptr .. To'Last - 1) := I_String (1 .. Iptr);

      for J in To'First + Rptr + 2 .. To'Last - Iptr - 1 loop

         To (J) := ' ';

      end loop;

   end Puts;

end Ada.Text_IO.Complex_Aux;